Bogie Wheelset Radial Mechanism with Structure of Adjustable Rigidity

ABSTRACT

A bogie wheelset radial mechanism with a structure of adjustable rigidity, composing two secondary frames ( 21 ) which are pin-connected via two connecting rods ( 22 ) arranged in a crosswise manner. The connecting rods ( 22 ) are pin-connected to the secondary frames ( 21 ) with round pins ( 24 ). Joints between the round pins ( 24 ) and the connecting rods ( 22 ) and/or joints between the round pins and the secondary frames ( 21 ) are provided with replaceable elastic materials. The materials can be made into rings. End portions of the connecting rods ( 22 ) are embedded into mounting grooves ( 25 ) located in the secondary frames ( 21 ) and are connected to the same with the round pins ( 24 ).

TECHNICAL FIELD

The invention relates to the technical field of railway transportation equipment, in particular to a rigidity-adjustable structure of a wheelset radial mechanism of a secondary frame type radial bogie of a railway freight car.

BACKGROUND ART

As is well known, a wheelset radial mechanism of a secondary frame type radial bogie of a railway freight car can provide the bogie with large shear rigidity and small bending rigidity, so that the bogie has linear high-speed runnability and excellent curve passing capacity. Thus, there is clearly a strong correlation between the wheelset radial mechanism and the shear rigidity and bending rigidity of the bogie. Structurally, the wheelset radial mechanism is formed by crosswise pin-connection of front and rear secondary frames with two connecting rods, the two secondary frames and the two connecting rods are connected in series, and the two connecting rods are connected in parallel. Thus, the rigidity of the wheelset radial mechanism is related to the cross angles between the secondary frames and the connecting rods and between the connecting rods.

Due to space limitation, the existing secondary frame type radial bogie is designed in a way that the cross angles between the secondary frames and the connecting rods and between the connecting rods in the wheelset radial mechanism are generally not easy to change, and the rigidity of the wheelset radial mechanism is generally very large, which results in that although the secondary frame type radial bogie can have the basic characteristics of a radial bogie, its operation performance cannot reach the optimal state, and the characteristics of the radial bogie have not been fully brought into play.

SUMMARY OF THE INVENTION

The invention discloses a bogie wheelset radial mechanism with a structure of adjustable rigidity according to the defects of the prior art.

The invention aims to provide a structure capable of realizing rigidity adjustment of a wheelset radial mechanism, so that the rigidity of the wheelset radial mechanism tends to be within a reasonable range and the performance of a radial bogie is improved; and the structure does not affect the structure and arrangement of other parts of the bogie, especially the wheelset radial mechanism.

The invention is realized by the following technical scheme:

A bogie wheelset radial mechanism with a structure which is of adjustable rigidity is provided. The wheelset radial mechanism is composed of front and rear secondary frames which are pin-connected via two connecting rods arranged in a crosswise manner, and is characterized in that the connecting rods are pin-connected to the secondary frames via round pins, and joints between the round pins and the connecting rods and/or joints between the round pins and the secondary frames are provided with replaceable elastic materials.

The joints between the round pins and the connecting rods and/or the joints between the round pins and the secondary frames are provided with rings made of the replaceable elastic materials.

End portions of the connecting rods are embedded into mounting grooves located in the secondary frames and are pin-connected to same via the round pins.

The end portions of the connecting rods are located on upper mounting planes or lower mounting planes of the secondary frames and are pin-connected to same via the round pins.

According to the invention, the elastomer materials with certain rigidity are arranged at the joints between the secondary frames and the connecting rods, which means the rigidity of the wheelset radial mechanism is related to the series connection of the secondary frames and the connecting rods via the elastic materials, thus increasing the adaptation range of the rigidity of the wheelset radial mechanism; besides, by replacing and setting elastic materials with different rigidity parameters, the rigidity of the wheelset radial mechanism can be adjusted without changing the structures of the secondary frames, the connecting rods and the like and the arrangement thereof in the bogie. The elastic materials can be made into parts with elasticity, such as the rings arranged at the joints between the round pins and the connecting rods and/or the joints between the round pins and the secondary frames, the elastic materials can be rubber, polyester elastomer and the like, and rings with different rigidities can be mounted according to rigidity requirements.

By adopting the method, the rigidity of the wheelset radial mechanism can be effectively adjusted, and the shear rigidity and the bending rigidity of the bogie can be adjusted accordingly, so that the linear and curvilinear runnability of the bogie can be greatly improved.

By adopting the method of the invention to control the rigidity of the wheelset radial mechanism, the load between the secondary frames and the connecting rods can be reduced by 10% to 50%, and the smaller the curve radius through which the bogie passes, the more obvious the effect, thereby improving the use reliability of the secondary frames and the connecting rods and reducing the risk of structural failure of each part.

By providing the replaceable elastic materials, which have buffering and damping effects, impact forces between the round pins and the secondary frames and between the round pins and the connecting rods are effectively reduced, thereby further improving the use reliability of the secondary frames and the connecting rods, and reducing the risk of structural failure of each part.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram (isometric diagram) of a general secondary frame type radial bogie;

FIG. 2 is a schematic diagram (isometric diagram) of a general wheelset radial mechanism 13;

FIG. 3 is an exploded view of a wheelset radial mechanism designed according to the present invention;

FIG. 4 is a schematic diagram of one mounting mode of an elastomer designed according to the present invention;

FIG. 5 is a schematic diagram of a second mounting mode of the elastomer designed according to the present invention; and

FIG. 6 is a schematic diagram of a connecting rod matched with the second mounting mode of the elastomer designed according to the present invention.

REFERENCE NUMERALS IN THE DRAWINGS

11—wheelset and bearing, 12—side frame, 13—wheelset radial mechanism, 14—bolster, 21—secondary frame, 22—connecting rod, 23—elastic ring, 24—round pin and other connectors, 25—mounting groove, 21′—secondary frame II, 22′—connecting rod II, 31—upper mounting plane, 32—lower mounting plane.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be described in detail below by way of embodiments, which are only used to further illustrate the present invention, but should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art in accordance with the above-mentioned contents of the present invention also fall within the scope of protection of the present invention.

With reference to attached drawings,

a bogie wheelset radial mechanism with a structure which is of adjustable rigidity is provided, the wheelset radial mechanism 13 is composed of front and rear secondary frames 21 which are pin-connected via two connecting rods 22 arranged in a crosswise manner, the connecting rods 22 are pin-connected to the secondary frames 21 via round pins 24, and joints between the round pins 24 and the connecting rods 22 and/or joints between the round pins and the secondary frames 21 are provided with replaceable elastic materials.

The joints between the round pins 24 and the connecting rods 22 and/or the joints between the round pins and the secondary frames 21 are provided with rings 23 made of the replaceable elastic materials. Rings 23 made of elastic materials with different rigidities can be mounted according to different requirements of the radial mechanism.

End portions of the connecting rods 22 are embedded into mounting grooves 25 located in the secondary frames 21 and are pin-connected to same via the round pins 24.

The end portions of the connecting rods 22 are located on upper mounting planes 31 or lower mounting planes 32 of the secondary frames 21 and are pin-connected to same via the round pins 24.

A connecting structure according to the present invention is that the end portions of the connecting rods 22 are embedded into the mounting grooves 25 located in the secondary frames 21 and are pin-connected to same via the round pins 24, as shown in FIGS. 3 and 4.

Another connecting structure according to the present invention is that the end portions of the connecting rods 22 are located on the upper mounting planes 31 or the lower mounting planes 32 of the secondary frames 21 and are pin-connected to same via the round pins 24, as shown in FIGS. 5 and 6.

FIG. 1 is a structure of a general secondary frame type radial bogie of a railway freight car, which mainly consists of a wheelset and bearing 11, a side frame 12, a wheelset radial mechanism 13, a bolster 14 and the like.

FIG. 2 is a structure of a general wheelset radial mechanism 13, which mainly consists of two secondary frames 21 and two connecting rods 22 which are pin-connected via round pins 24, and the connection must have rotational freedom.

FIGS. 3 and 4 show an embodiment of the present invention, in which the elastic rings 23 are additionally arranged at the joints between the secondary frames 21 and the connecting rods 22, which are two main components of the wheelset radial mechanism 13, and form a series connection relationship with the secondary frames 21 and the connecting rods 22, and the elastic rings 23 are mounted in end holes of the connecting rods 22.

FIGS. 5 and 6 show another embodiment of the present invention, in which the elastic rings 23 are mounted in middle holes of the secondary frames II 21′, the connecting rods II 22′ are still pin-connected to the secondary frames II 21′ in a crosswise manner, and the connecting rods II 22′ can be located on the upper mounting planes 31 or the lower mounting planes 32 of the secondary frames II 21′. 

1. A bogie wheelset radial mechanism with a structure which is of adjustable rigidity, the wheelset radial mechanism (13) being composed of front and rear secondary frames (21) which are pin-connected via two connecting rods (22) arranged in a crosswise manner, wherein the connecting rods (22) are pin-connected to the secondary frames (21) via round pins (24), and joints between the round pins (24) and the connecting rods (22) and/or joints between the round pins and the secondary frames (21) are provided with replaceable elastic materials.
 2. The bogie wheelset radial mechanism with the structure which is of adjustable rigidity according to claim 1, wherein the joints between the round pins (24) and the connecting rods (22) and/or the joints between the round pins and the secondary frames (21) are provided with rings (23) made of the replaceable elastic materials.
 3. The bogie wheelset radial mechanism with the structure which is of adjustable rigidity according to claim 1 or 2, wherein end portions of the connecting rods (22) are embedded into mounting grooves (25) located in the secondary frames (21) and are pin-connected to same via the round pins (24).
 4. The bogie wheelset radial mechanism with the structure which is of adjustable rigidity according to claim 1 or 2, wherein the end portions of the connecting rods (22) are located on upper mounting planes (31) or lower mounting planes (32) of the secondary frames (21) and are pin-connected to same via the round pins (24). 